تأثير قير اصلاح شده با پليمر و پودرلاستيك در ميزان چسبندگي به مصالح سنگي به روش مقاومت چسبندگي قير(BBS)

According to the investigations carried out on the performance of the countryʹs roads, it can be seen that asphalt pavements suffer from problems and failures during the service period and before the end of their useful life, including fatigue cracks, asphalt rutting, and moisture damage. that the characteristics of bitumen as a viscoelastic material play a major role in controlling the deterioration and strength of asphalt mixtures. One of the ways to improve the performance properties of bitumen is to use modifiers and suitable additives. Among the modifiers used for bitumen, we can mention polymer additives as well as rubber powder, which have received a lot of attention recently. Polymer and rubber powder are effective in improving bitumen performance indicators and increasing bitumen adhesion to different aggregates. In recent years, new test methods have been developed to eva‎luate bitumen adhesion. Tensile and pull-out strength with the bitumen bond strength (BBS) test has become increasingly popular among other methods that can be used to quantify the bitumen adhesion to aggregate and the internal bond strength of asphalt. This method has been developed with the aim of solving the shortcomings and limitations that exist in the eva‎luation of adhesion strength between bitumen and stone materials. In this research, polymer and rubber powder additives, as well as four types of stones, including silica and limestone, have been used. In the first step, the stones were examined from the point of view of mineralogy using XRF test, and in the next step, bitumen modified with polymer, rubber powder and the combination of these two products were produced, and then the required samples were prepared and the adhesion strength test of bitumen was performed to check the adhesion and also the adhesion strength of bitumen and aggregate. The results obtained from this research showed that the addition of polymer polybite and rubber powder to the adhesive increases the adhesion strength and also the adhesion of bitumen to the aggregate in dry and wet conditions, and also the samples made with 10% polybite polymer showed the best performance among the rest of the compounds.

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